CA2492853A1 - Field emission cold cathode - Google Patents

Field emission cold cathode Download PDF

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Publication number
CA2492853A1
CA2492853A1 CA002492853A CA2492853A CA2492853A1 CA 2492853 A1 CA2492853 A1 CA 2492853A1 CA 002492853 A CA002492853 A CA 002492853A CA 2492853 A CA2492853 A CA 2492853A CA 2492853 A1 CA2492853 A1 CA 2492853A1
Authority
CA
Canada
Prior art keywords
cold cathode
field emission
emission cold
carbon
base material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002492853A
Other languages
French (fr)
Other versions
CA2492853C (en
Inventor
Donald A. Shiffler, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Air Force
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2492853A1 publication Critical patent/CA2492853A1/en
Application granted granted Critical
Publication of CA2492853C publication Critical patent/CA2492853C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/304—Field-emissive cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/022—Manufacture of electrodes or electrode systems of cold cathodes
    • H01J9/025—Manufacture of electrodes or electrode systems of cold cathodes of field emission cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/30—Cold cathodes
    • H01J2201/304—Field emission cathodes
    • H01J2201/30446—Field emission cathodes characterised by the emitter material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

A field emission cold cathode (11) for use in vacuum tubes. A carbon velvet material (25) is comprised of high aspect ratio carbon fibers embedded perpendicular to a base material. The tips and/or the shafts of the carbon velvet material (25) are coated with a low work function cesiated salt. The base material of the carbon velvet material (25) is bonded to a cathode surface (27). The cold cathode (11) emits electrons when an electric field is applied, even at operating temperatures less than 900°C.
CA002492853A 2002-07-18 2002-07-18 Field emission cold cathode Expired - Fee Related CA2492853C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2002/021283 WO2004010450A1 (en) 2002-07-18 2002-07-18 Field emission cold cathode

Publications (2)

Publication Number Publication Date
CA2492853A1 true CA2492853A1 (en) 2004-01-29
CA2492853C CA2492853C (en) 2009-03-31

Family

ID=30769013

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002492853A Expired - Fee Related CA2492853C (en) 2002-07-18 2002-07-18 Field emission cold cathode

Country Status (10)

Country Link
EP (1) EP1523751A1 (en)
JP (1) JP4295215B2 (en)
CN (2) CN100508100C (en)
AU (1) AU2002322392B2 (en)
BR (1) BR0215809A (en)
CA (1) CA2492853C (en)
EA (1) EA009410B1 (en)
HK (2) HK1078678A1 (en)
IL (1) IL166173A (en)
WO (1) WO2004010450A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2487433C1 (en) * 2011-12-29 2013-07-10 Открытое акционерное общество "Центральный научно-исследовательский институт "Электрон" Cathode pack of vacuum tube for high-voltage operation
CN107385376B (en) * 2017-08-04 2019-07-19 华中科技大学 A kind of spray caesium device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6091186A (en) * 1996-11-13 2000-07-18 The Board Of Trustees Of The Leland Stanford Junior University Carbon-containing cathodes for enhanced electron emission
JP3610325B2 (en) * 2000-09-01 2005-01-12 キヤノン株式会社 Electron emitting device, electron source, and method of manufacturing image forming apparatus

Also Published As

Publication number Publication date
EP1523751A1 (en) 2005-04-20
HK1135794A1 (en) 2010-06-11
AU2002322392B2 (en) 2009-05-28
IL166173A0 (en) 2006-01-15
AU2002322392A1 (en) 2004-02-09
WO2004010450A1 (en) 2004-01-29
EA009410B1 (en) 2007-12-28
AU2002322392A2 (en) 2004-02-09
JP2005533356A (en) 2005-11-04
HK1078678A1 (en) 2006-03-17
CN101527238A (en) 2009-09-09
EA200500228A1 (en) 2005-08-25
CA2492853C (en) 2009-03-31
CN1639821A (en) 2005-07-13
CN101527238B (en) 2011-07-13
CN100508100C (en) 2009-07-01
IL166173A (en) 2012-02-29
BR0215809A (en) 2007-03-20
JP4295215B2 (en) 2009-07-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130718